SpaceAtlas Space Object Data
NASA JPL SBDB · 2013 NJ15

2013 NJ15

2013 NJ15 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.566 AU once every 1.96 yr.

Amor Observations: 42
Orbital Period · P
1.96 yr
v(q)
28.4 km/s
v(Q)
19.9 km/s
Diameter · ≈
0.1 km
TJ
4.36
Eccentricity · e
0.1756

Orbit and dynamics

Between its closest point (1.291 AU) and its farthest (1.841 AU), the heliocentric distance changes by 0.55 AU over every revolution.

One full revolution takes 1.96 yr (716 days), computed from the semi-major axis of 1.566 AU.

An eccentricity of 0.176 makes the orbit moderately elongated.

The orbital plane is tilted 16.77° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 28.4 km/s at perihelion and falls to 19.9 km/s at aphelion.

Its perihelion lies just outside Earth's orbit, which is why it is classed as Earth-approaching rather than Earth-crossing.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 22.7 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.1 km.

Observation record and orbit quality

Astrometry from 42 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5564 arcseconds.

Condition code U = 1 means the orbit is very well determined, leaving only a small uncertainty in the future ephemeris.

About these computed values

Orbital periods, perihelion and aphelion speeds, and diameter estimates on this page are computed by SpaceAtlas from the JPL SBDB orbital elements. They are derived quantities, not values copied from the source catalogue.

Orbital Parameters

Semi-Major Axis
1.566 AU
Eccentricity
0.1756
Perihelion
1.291 AU
Aphelion
1.84099 AU
Inclination
16.77°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
203.29°

Orbit diagram

The Sun sits at the focus (orange). Earth's orbit is the grey circle at 1 AU. The red dot marks the object's position at the catalog epoch.

3D orbit (interactive)

Drag to rotate; scroll or pinch to zoom. The Sun is at the focus (orange), Earth's orbit is the grey ring at 1 AU, and the red dot marks the object's current position.

Close approaches

Predicted close approaches to Earth, from NASA's Center for Near-Earth Object Studies (CNEOS).

Date (UTC)Miss distanceVelocity
2058-Jun-27 14:17 0.432206 AU
64657037 km
8.10 km/s
2060-Jul-13 17:08 0.313389 AU
46882372 km
8.46 km/s
2062-Jul-26 18:05 0.279831 AU
41862054 km
8.47 km/s
2064-Aug-09 05:05 0.364087 AU
54466669 km
8.41 km/s
2066-Sep-02 08:42 0.497217 AU
74382570 km
6.88 km/s

Distances in astronomical units (AU) and kilometres. Source: NASA/JPL CNEOS Close Approach Data API.

Physical Parameters

Diameter
— km
Albedo
—
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
22.7

Orbit Quality

RMS
0.55641
Condition
1
Orbit ID
—
Data source: NASA JPL Small-Body Database · NASA CNEOS. Orbital periods, perihelion and aphelion speeds, and diameter estimates on this page are computed by SpaceAtlas from the JPL SBDB orbital elements. They are derived quantities, not values copied from the source catalogue.

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